ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
Product Detailed Parameters
- Description：IC REG BUCK 1.8V 300MA SOT23-5
- Series：-
- Mfr：Fairchild Semiconductor
- Package：Bulk
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Fixed
- Number of Outputs：1
- Voltage - Input (Min)：2.5V
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：1.8V
- Voltage - Output (Max)：-
- Current - Output：300mA
- Frequency - Switching：1MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：SC-74A, SOT-753
- Supplier Device Package：SOT-23-5
- Grade：-
- Qualification：-
Download product information
Overview
The FAN5307S18X is a high-efficiency step-down DC-DC converter manufactured by Fairchild Semiconductor. It operates with an input voltage range of 2.5V to 5.5V and provides a fixed output voltage of 1.8V. The device delivers up to 300mA of output current using synchronous PWM current mode control at a fixed switching frequency of 1MHz. It features a 95% efficiency rating, 15µA quiescent current, and soft start functionality. The component is housed in a SOT-23-5 surface-mount package and supports operation temperatures from -40°C to +85°C.
Feature Summary
- Synchronous PWM current mode operation for high efficiency
- Fixed 1MHz switching frequency reduces external component size
- Power Save Mode enhances light-load efficiency
- Soft start limits inrush current during startup
Applications
- Cell phones
- Pocket PCs and PDAs
- Battery-powered portable devices
- Digital cameras
- Low power DSP supplies
Procurement Notes
Verify the specific suffix 'S18X' confirms the fixed 1.8V output variant within the SOT-23-5 package. Confirm RoHS compliance status as per the latest datasheet revision. Check for end-of-life notices or obsolescence warnings, as this part may be discontinued. Ensure the supplier provides valid traceability documentation for quality assurance purposes.
Selection Notes
Select this component when a fixed 1.8V rail is required from a 2.5V to 5.5V source with moderate current demands. It is suitable for space-constrained designs due to the small SOT-23-5 footprint. Consider alternatives if higher output currents exceeding 300mA are needed or if adjustable output voltage flexibility is required for other system voltages.
Part Context
This part belongs to the FAN5307 series of high-efficiency step-down converters. The series includes variants with different output voltages and packages, such as the MLP version. It is designed for battery-powered applications requiring low noise and high efficiency. The manufacturer has transitioned through acquisitions, affecting long-term supply chain availability.
Replacement Considerations
Direct substitutes include other parts from the same family with compatible pinouts and electrical characteristics. Verify that any replacement maintains the 1.8V fixed output and 300mA current capability. Ensure the alternative package matches the SOT-23-5 form factor for board compatibility.
